Acetone, aerobic metabolism

We can see that for type 1 processes, high growth rate is obligately linked to a high rate of product formation. Indeed, this is the case for all products produced by a fermentative mode of metabolism, eg ethanol, lactic add, acetone. Chemostat studies have shown that for most aerobic processes when growth is limited by some nutrient other than the carbon source, the yield of product decreases with increase in spedfic growth rate (p or D p = dilution rate (D) in chemostat culture). Conversely, both the biomass yield and the spedfic rate of substrate utilisation (qs g substrate g biomass-1 h-1) increase with spedfic growth rate. 

The anaerobic biotransfonnation of aromatic compounds may be dependent on COj, and a review by Ensign et al. (1998) provides a brief summary of the role of CO2 in the metabolism of epoxides by Xanthobacter sp. strain Py2, and of acetone by both aerobic and anaerobic bacteria. 

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